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Lars Thrane LT-3100 Iridium Communications System

Looking for an Iridium communication system, then this system will meet all your requirements.

The LT-3100 Iridium Communications System is a maritime satellite communication product from Lars Thrane A/S. The LT-3100 system is designed for the professional market (deep sea, fishing, and workboats), but can be used for the leisure market as well. The LT-3100 system meets all standards and certification requirements needed for worldwide maritime satellite communication equipment.


The LT-3100 system has voice and data capabilities with 100% global coverage. The LT-3100 system consist of a control unit, handset unit, and antenna unit. A single cable solution connects the control unit with the antenna unit. Using a standard coaxial cable, up to 500 meters of separation between the units can be obtained, giving freedom to mount the antenna in the best possible location, with free line of sight to the satellites.

The LT-3100 system can be used as the primary satellite communication product on vessels, covering the basic communication needs in terms of connectivity between the ship and shore. In addition, the LT-3100 system can be used for crew calling or as a back-up satellite communication product. The LT-3100 system provides voice, SMS, data, vessel tracking, and other Iridium services with competitive airtime rates, making it the perfect satellite communication product on board any vessel.

The LT-3100 Iridium Communications System is designed and built for the demanding and rough environment at sea and with an operational temperature range from -25⁰C to +55⁰C (-13⁰F to +131⁰F).


The LT-3100 system is very easy to install and requires no yearly maintenance or service. Everything is included in the box to get started with the installation and operating the LT-3100 system. The control unit can be installed using either a bracket mount or flush mount. The antenna unit can be mounted using either a pole mount (1.5″ tube) or angle bracket mount (1″ to 2.5″ tube). The control unit has a large 4.3″ TFT display, from where the system can be operated with overview and ease. The built-in webserver can be used for service and maintenance.

More than 40 years of experience have been put into the design and construction of the LT-3100 Iridium Communications System, with an exceptional performance and specification level.

Key Features

  • Voice, SMS, Data, and Vessel tracking
  • 2.4 kbit/s and 10 kbit/s compressed data
  • Programmable softkeys for e.g. Emergency Service
  • Single antenna cable solution (up to 500 m)
  • High-performance GNSS/GPS receiver
  • Noise-canceling microphone and equalizer for improved audio quality
  • Bluetooth interface supporting voice, SMS, and data
  • Large 4.3” TFT display supporting day and night modes
  • Voice prompt audio feedback
  • Firewall and user authentication for high level of security
  • Webserver for configuration and maintenance
  • Support external LAN Wi-Fi Access Points
  • Support external SIP PABX and SIP handsets
  • Connectivity of Smartphones, Softphones, and Apps


  • Certification & standards: CE, IEC 60945, IEC 60950, EN 300 440 FCC, IC, RoHS, Iridium Communication Inc.
  • Vibration, operational: IEC 60945 (sine) & Proprietary Maritime Random profile (240 h)
  • Vibration, survival: Proprietary Maritime Randome profile (100 h)
  • Vibration, shock: Proprietary Maritime profile (20 g, 11 ms)
LT-3110 Control Unit
  • Weight: 698 g (1.54 lbs)
  • Dimensions: 224.0 x 120.0 x 70.0 mm (8.82 x 4.72 x 2.76 in)
  • Temperature, operational: -15°C to +55°C (+5°F to +131°F)
  • IP rating, dust and water: P42 (front) / IP40 (back)
  • Interfaces: Ethernet, auxiliary, power, chassis ground, antenna, handset, Bluetooth, SIM card
  • Input voltage: 9.6-32.4 VDC
  • Power consumption: < 50 W
  • Compass safe distance, std. and steer: 0.3 m (1 ft)

LT-3120 Handset Unit

  • Weight: 295 g (0.65 lbs)
  • Dimensions: 209.0 x 54.0 x 38.0 mm (8.23 x 2.13 x 1.50 in)
  • Temperature, operational: -15°C to +55°C (+5°F to +131°F
  • IP rating, dust and water: IP30
  • Compass safe distance, std. and steer: 0.3 m (1 ft)

LT-3130 Antenna Unit

  • Weight: 882 g (1.94 lbs)
  • Dimensions: 151.0 x Ø 149.0 mm (5.94 x Ø 5.87 in)
  • Temperature, operational: -25°C to +55°C (-13°F to +131°F)
  • IP rating, dust and water: P67
  • Compass safe distance, std. and steer: 0.3 m (1 ft)
  • Antenna communication cable Warranty: up to 500 m (1500 ft)
  • Warranty: 2 year
  • Maintenance: None
Whats in the Box
  • LT-3110 Control Unit
  • LT-3120 Handset Unit and Cradle
  • LT-3130 Antenna Unit
  • Control Unit
  • Bracket Mount
  • 3m DC Power Cable
  • Quick Installation Guide
  • Unit Test Sheet 
  • Flush Mount Bracket, Antenna Bracket, & Cables see website

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